The Red Nucleus in Motor Control and Autism Spectrum Disorder

Neuromotor differences of motor coordination, timing, postural regulation, and prospective motor control are common and emerge early in autism spectrum disorder (ASD). However, their underlying neural mechanisms remain incompletely understood, with existing research emphasising cortical and cerebellar systems. This review re-examines the red nucleus (RN), a midbrain structure embedded within cortical, cerebellar, and olivary motor pathways, as an underexplored component of distributed sensorimotor networks. We synthesise evidence from comparative neuroanatomy, animal experiments, human neuroimaging, movement disorders, and autism research, distinguishing direct RN findings from broader circuit-level inferences. Neuroimaging studies have reported RN-region susceptibility differences in autistic children, including an exploratory association with fine-motor development, but reproducible links to specific motor processes and RN-related causal mechanisms remain unestablished. We therefore propose a testable hypothesis that differences in RN structure, function, or connectivity may be associated with specific dimensions of motor function in autism. Error-related sensorimotor adaptation provides a primary experimental target, complemented by prospective motor control. Future investigations combining RN-sensitive neuroimaging, quantitative motor assessment, and transdiagnostic comparisons with developmental coordination disorder may determine whether RN-related measures provide explanatory information beyond sensorimotor systems. This framework positions the RN as a candidate component of autism-related motor networks.